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1. The measure of a man's ability to attract women using the massiveness of either his chest, leg or other muscles/ bodily parts. (noun)
2. A type of strength, contrast with flaccidity or softness. (noun)
1. Evans' masstivity attracts many girls.
2. The masstivity of our debate team allowed us to overpower our flaccid opponents.
by Master_Debater_God January 25, 2016
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